Grease-gun.



1. H. GORDON.

GREASE GUN.

APPucATloN HLED nac. 4, 191s.

. Patented July 31, 1917,

A TTORNE Y UNITED STATES PATENT OFFICE.

JOHN II. GORDON, OF ARLINGTON, WASHINGTON, ASSIGNOR OF ONE-HALF TOpNEII.BROWN, 0F ARLINGTON, WASHINGTON.

GREASE- GUN.

Specification of Letters Patent.

Patented July 31, 1917.

Application led December 4, 1916. Serial No. 134,810.

To all whom t may concern:

Be it lrnown that I, JOHN ITI. GORDON, a citizen of the United States,residing at Arlington, in the county of Snohomish and State ofiVashington, have invented certain new and useful Improvements inGrease- Guns, of which the following is a specification.

This invention relates to grease guns such as are employed, for example,to supply grease for lubricating purposes into the gear case of anautomobile; and it has for its object to provide a simple, compact and'efficient device of this character which is adapted to be expeditiouslycharged with grease and from which the latter may be convenientlyexpelled.

With these ends in view, the invention consists in the novelconstruction, arrangement and combination of parts, as will behereinafter described and claimed.

In the accompanying drawings, Figure 1 is an elevational view of myimproved grease gun. Fig. 2 is a longitudinal section. Fig. 3 is a topplan view. Fig. l is a hori zontal section through 4 4 of Fig. 1, andFig. 5 is a similar Aview through 5-5 of Fig. 2.

In carrying out my invention, I provide a barrel formed of outer andinner cylindrical members having peripheral walls 6 and 7 which arerespectively secured to the bottom and top heads 8 and 9. As shown, thetop head 9 is provided with a circun1- ferential flange 10 formedintegral with a circular portion 11 tted within the upper end of thewall 7 of said inner member and to which it is rigidly secured, as byscrews or pins 12.

The bottom head 8, in like manner, is provided with a circumferentialflange 13 from which a protruding circular portion 14 extends into andis detachably secured to the outer member, and to which the head 8 isrigidly secured by screws l5.

The upper end of the wall 6 is, moreover, provided with a peripheralflange 16 engaging in a recess 17 formed in a ring 91 which is securedto the head 9 by rivets 18 and constitutes, in effect, a part of suchhead.

By thus rigidly securing the inner wall to the top head and connectingthereto, as explained, the outer wall, the two members are coupledagainst separation but are capable of being rotated, one relative to theother, by the operator turning the same through the instrumentality ofthe heads. To enable the operator to better grasp the heads, they areprovided with peripherally disposed notches 19 and 191.

The peripheral walls 6 and 'l' of said members are respectively providedwith apertures or openings 2O and 21 which, by suitably turning themembers, may be brought into register, as in Figs. 2 and 5,

when charging the gun with grease, afterr which the members arerelatively turned into the positions in which they are illustrated inFigs. 1 and A with the openings 2O and 21 diametrically opposite, ornearly so. The opening 21 of the inner member desirably extends almostthe entire length of the wall 7, while the openings 2O of the other wallextend for substantially the same distance but are separated by a bar 61which acts to maintain the barrel in circular form when subjected to aninternal pressure.

The bottom head is provided with an axially disposed outlet from whichextends a delivery tube 22.

23 represents a piston having a packing disk 24 of leather or othersuitable material which will adord a substantially non-leakable t withthe inner surface ofthe inner member and also against the inner surfaceof the outer member where the latter is exposed through the opening 2l.Said piston is provided with a.. threaded hole in which engages a screw25 whereby the piston may be retracted prior to charging the gun, andsubsequently forced down to expel the grease through the delivery tube22. Said screw extends through a hole 26 bored into the top head 9, andbelow the same the screw is provided with a collar 251 which may be madeintegral or otherwise rigidly secured to the screw.

The oflice of this collar is to receive the end thrust of the screw whenthe piston is employed in forcibly ejecting the grease.

To prevent axial movements of the screw in the opposite direction, Iprovide a sleeve 27 on the screw to engage against the outside of thehead 9, said sleeve being detachably connected to the screw by a rod 28which extends through alined holes 29 and 30 provided therefor in thescrew and sleeve. This rod also serves as the operating handle for thescrew, and is accordingly formed with a crank extremity 281.

3l represents a so-called split pin extending through the handle, asshown, to prevent the accidental withdrawal ot the same from the screw.

An important characteristic of my improved gun resides in the meanswhereby the piston and its operating screw may be removed :trom thebarrel, such action being accomplished by withdrawing the screws 15,then taking out the head 8, so that when the handle-rod 28 is disengagedfrom the screw 25, the latter, together with the piston, can be removedfrom the open end ot the barrel.

The gun is readily filled by manipulating` the barrel members to presentthe charging opening into register and by the use of a screw for forcingthe piston against the charge even the thickest varieties ot grease maybe ejected from the spout with the exercise ot but little manual effort.

Then in operation the piston is prevented from rotating by reason of apacking 24e projecting into and engaging against a side of the wallopening 2l.

IVhat I claim, is-

l. In a grease gun, a barrel comprising two interitting tubular elementshaving side openings, and Yhead elements rigidly secured to therespective tubular elements, the head element of one of said membersbeing rotatably connected with the tubular element ot the other memberand positively connecting the two members against relative axialmovements, a piston operable within the inner member, and meansextending through one of the heads tor actuating the piston for thepurpose of discharging` material through an outlet provided in the otherof said heads.

2. In a grease gun, the combination oi a barrel comprising two members,each of said members having a head and an apertured peripheral wallrigidly connected to the respective head, the peripheral wall of one ofsaid members being provided with a flange to rotatably engage the samewith the head of the other member, a piston wit-hin said barrel, and ascrew engaging said piston and extending through a hole provided in oneor' the heads, and means to rotate the screw whereby the piston isactuated to eject material from an outlet provided in the other head.

3. In a grease gun, the combination ot a barrel comprising twoconcentric relatively rotatable cylindrical members, each of saidmembers having a head and a, peripheral wall, openings provided in theperipheral walls of said members, the openings oi the outer of saidwalls being separated by a. circum'terentially arranged bar serving tomaintain the inner wall ot' a circular shape when subjected to aninternal pressure, a piston operable within the inner member, and meansto actuate the piston to discharge material from the barrel through anoutlet provided in one of said heads.

Signed at Arlington, Vash., this 25th day otl November, 1916.

JOHN H. GORDON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of il'atent,v

Washington, '.D. C.

